Page 89 - EPR Catalog 2015

Current monitoring relays, single-phase
Technical data - Current monitoring relays

Type CM-SRS.1 CM-SRS.2 CM-SRS.M CM-SFS.2
Input circuit - Supply circuit
Rated control supply voltage Us A1-A2 110-130 V AC A1-A2
A1-A2 220-240 V AC
Rated control supply voltage Us tolerance A1-A2 24-240 V AC/DC 2
Rated frequency
-15...+10 %
Current / power consumption AC versions 50/60 Hz
Power failure buffering time AC/DC versions 50/60 Hz or DC
Transient overvoltage protection
see data sheets
20 ms
Varistors

Input circuit - Measuring circuit B1/B2/B3-C
Monitoring function
over- or undercurrent monitoring over- and under-
Measuring method configurable current monitoring

True RMS measuring principle

Measuring inputs CM-SxS.x1 CM-SxS.x2

Terminal connection B1-C B2-C B3-C B1-C B2-C B3-C
Measuring ranges AC/DC 3-30 mA 10-100 mA 0.1-1 A 0.3-1.5 A 1-5 A 3-15 A 2)
0.1 ⏲ 0.01 ⏲ 0.0025 ⏲
Input resistance 3.3 ⏲ 1⏲ 0.05 ⏲ 50 A
Pulse overload capacity t < 1 s 500 mA 1A 10 A 15 A 100 A

Continous capacity 50 mA 150 mA 1.5 A 2A 7 A 17 A

Threshold value(s) adjustable within the indicated measuring range

Setting accuracy of threshold value 10 %

Hysteresis related to the threshold value 3-30 % adjustable 5 % fixed

Measuring signal frequency range DC / 15 Hz - 2 kHz
Rated measuring signal frequency range DC / 50-60 Hz
Maximum response time AC: 80 ms / DC: 120 ms
Accuracy within the control supply voltage tolerance ͬU ͨ 0.5 %
Accuracy within the temperature range ͬU ͨ 0.06 % / °C

Timing circuit

Start-up delay TS none 0 or 0.1-30 s adjustable

Tripping delay TV none 0 or 0.1-30 s adjustable

Repeat accuracy (constant parameters) Ȁ0.07 % of full scale
Accuracy within the control supply voltage tolerance - ͬt ͨ 0.5 %
Accuracy within the temperature range - ͬt ͨ 0.06 % / °C

Indication of operational states

Control supply voltage U/T: green LED V: control supply voltage applied,

Measured value X: s t a r t- u p delay TS active,
Relay status W: tripping delay TV active

I: red LED V: overcurrent,

W: undercurrent

R: yellow LED V: relay energized, no latching function

Z: relay energized, active latching function

Y: relay de-energized, active latching function

Output circuits 11(15)-12(16)/14(18), 21(25)-22(26)/24(28) - Relays

Kind of output 1 c/o contact 2 c/o contacts 1x2 c/o contacts
or 2x1 c/o contact
configurable

Operating principle open-circuit principle 1) open- or closed-circuit principle configurable 1)

Contact material AgNi

Rated operational voltage Ue IEC/EN 60947-1 250 V

Minimum switching voltage / minimum switching current 24 V / 10 mA

Maximum switching voltage / maximum switching current 250 V AC / 4 A AC

Rated operational current Ie AC-12 (resistive) at 230 V 4 A
(IEC/EN 60947-5-1) AC-15 (inductive) at 230 V 3 A

DC-12 (resistive) at 24 V 4 A

DC-13 (inductive) at 24 V 2 A

AC rating Utilization category B 300
(UL 508) (Control Circuit Rating Code)

max. rated operational voltage 300 V AC

max. continuous thermal current at B 300 5 A

max. making/breaking apparent power 3600/360 VA
(Make/Break) at B 300

Mechanical lifetime 30x106 switching cycles
Electrical lifetime (AC-12, 230 V, 4 A) 0.1x106 switching cycles

Max. fuse rating to achieve short-circuit n/c contact 6 A fast-acting 10 A fast-acting 6 A fast-acting
protection n/o contact 10 A fast-acting

1) Open-circuit principle: output relay energizes if the measured value exceeds b / falls below a the adjusted threshold value
Closed-circuit principle: output relay de-energizes if measured value exeeds b / falls below a the adjusted threshold value

2) In case of measured currents > 10 A, lateral spacing has to be min. 10 mm

2CDC 110 004 C0210 | Catalog Electronic Products and Relays 2015 | ABB 2/22